Moving Ions Vary Electronic Conductivity in Lead Bromide Perovskite Single Crystals through Dynamic Doping
| Autor: | Antonio Guerrero, Eric Gros-Daillon, Marisé García-Batlle, Oriane Baussens, Julien Zaccaro, Jean-Marie Verilhac, Germà Garcia-Belmonte, Smaïl Amari |
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| Přispěvatelé: | Universitat Jaume I, Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Optique et Matériaux (OPTIMA), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), CEA Grenoble (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), DRT/LITEN/DTBH/LTH (CEA), European Project: Grant N°777222,PERXI, European Project: Grant n°871336,PeroXIS, Optique et Matériaux (NEEL - OPTIMA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
dynamic doping
Materials science electronic conductivity Inorganic chemistry Doping Lead bromide ion dynamics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Ion [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Electronic conductivity 0210 nano-technology ComputingMilieux_MISCELLANEOUS hybrid perovskites Perovskite (structure) |
| Zdroj: | Advanced Electronic Materials Advanced Electronic Materials, Wiley, 2020, 6 (10), pp.2000485. ⟨10.1002/aelm.202000485⟩ Advanced Electronic Materials, 2020, 6 (10), pp.2000485. ⟨10.1002/aelm.202000485⟩ Repositori Universitat Jaume I Universitat Jaume I |
| ISSN: | 2199-160X |
| DOI: | 10.1002/aelm.202000485⟩ |
| Popis: | Metal halide perovskite single crystals are being explored as functional materials for a variety of optoelectronic applications. Among others, solar cells, field‐effect transistors, and X‐ and γ‐ray detectors have shown improved performance and stability. However, a general uncertainty exists about the relevant mechanisms governing the electronic operation. This is caused by the presence of mobile ions and how these defect species alter the internal electrical field, interact with the contact materials, or modulate electronic properties. Here, a set of high‐quality thick methylammonium lead tribromide single crystals contacted with low‐reactivity chromium electrodes are analyzed by impedance spectroscopy. Through examination of the sample resistance evolution with bias and releasing time, it is revealed that an interplay exists between the perovskite electronic conductivity and the defect distribution within the crystal bulk. Ion diffusion after bias removing changes the local doping density then governing the electronic transport. These findings indicate that the coupling between ionic and electronic properties relies upon a dynamic doping effect caused by moving ions that act as mobile dopants. In addition to electronic features, the analysis extracts values for the ion diffusivity in the range of 10−8 cm2 s−1 in good agreement with other independent |
| Databáze: | OpenAIRE |
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